Sony #364 SR621SW 1.55V Silver Oxide Watch Battery

Battery works as described and has a few years before the expiration date. Super tiny battery that's not sold in stores (which was a little inconvenient since I had to wait close to 1 week for delivery), it's the same diameter but thinner than the standard watch battery sold in stores. I chose this brand specifically because it was the same brand as the one I was replacing and it was a better deal than another brand.